Thing is Don, where do we draw the line in defining someone as mad? Everyone says he must mad because he purposefully bought guns and went out and killed people. But we don't think terrorists are mad for doing the same thing, and we don't class the person flying a drone 10,000 miles away as mad even thought they might kill dozens at a stroke. The problem is these two examples have a context, we expect terrorists to kill people, and we train our servicemen and women with that purpose too, but we don't expect a civilian to do the same. Why not?

The truth is, this might be a kid who has got his wires crossed, with appalling results. The fact he wears a body armour and helmet means nothing; he's taking his cues from what he sees on the telly, policemen dressed the same way when dealing with protestors, often violently. He might be in a world of his own, but that's no different to millions of others. What's really terrifying is not the worry of a lone madman, it's the fact ordinary citizens who for some reason snap and loose perspective can now enact their revenge fantasies simply by buying a gun, getting on the internet and doing some basic chemistry.

The problem is, there's no desire amongst the movers and shakers to limit the availability of guns and stop these people from committing the most horrendous crimes.